The disruptive collapse of the current sustained equilibrium of a tokamak is perhaps the single most serious obstacle on the path toward controlled thermonuclear fusion. The current disruption is generally too fast to be identified early enough and tamed efficiently, and may be associated to a variety of initial perturbing events. However a common feature of all disruptive events is that they proceed through the onset of MHD instabilities, and field reconnection processes developing magnetic islands which eventually destroy the magnetic configuration. Therefore the avoidance and control of magnetic reconnection instabilities is of foremost importance and great attention is focussed on the promising stabilization techniques based on localized rf power absorption and current drive. Here a short review is proposed of key aspects of high power rf control schemes (and specifically Electron Cyclotron Heating and Current Drive ECH/ECCD) for tearing modes, considering also some effects of plasma rotation. From first principles physics considerations, here new conditions are presented and discussed to achieve control of the tearing perturbations by means of high power (PEC ≥ Pohm), in regimes where strong nonlinear instabilities may be driven, such as secondary island structures, which can blur the detection and limit the control of the instabilities. Here we consider recent work which motivates the search of improvement of some traditional control strategies, namely the feedback schemes based on strict phase tracking of the propagating magnetic islands.